Fan structure for air-cooled motors



Y Dec. 4, 1923. 1,47 ,137 J. BI LAN FAN STRUCTURE FOR AIRCOOLED MOTORSFiled May 24, 1925 FIG. 2. FIG. 3. FIG. 5.

Patented Dec. 4, 1923.

UNITED STATES.

JOHN BILAN, OF FLINT, MICHIGAN.

FAN STRUCTURE FOR AIB-COOLED MOTORS.

Applieation filed May 24, 1923.

To all whom it may concern:

Be it known that 1, JOHN BILAN, a citizen of Ukraine, residing at Flint,in the county of Genesee and State of Michigan,

have invented certain new and useful Improvements in Fan Structures forAir-'- Cooled Motors, of which the following is a specification.

This invention relates to certain new and useful improvements in fanstructures for air cooled motors wherein a current of air is forcedthrough an air chamber formed in the motor casing for the purpose ofcooling the motor by air instead of the usual water circulating system.

The primary object of the invention is to provide a fan structure forair cooled. m0- tors wherein a casing having a fan revolubly mountedtherein, has a conduit con nection with an air chamber associated with amotor to create a circulation of air through the motor for the purposeof cooling the same.

With the above and other objects in view as the nature of the inventionis better understood, the same consists of the novel form, combinationand arrangement of parts hereinafter more fully described, shown in theaccompanying drawing and 80 claimed.

In the accompanying drawing, wherein like reference characters designatecorresponding parts throughout the several views,

Figure 1 is a longitudinal sectional view of a fan structure for aircooled motors constructed in accordance with the present inventionshowing the conduit connection between the fan structure and the motor,

Figure 2 is a rear elevational View of the 4 supporting arm for theforward end of the fan structure,

Figure 3 is a side elevational view of the supporting arm shown in Fig.2,

Figure 4;- is a cross sectional view taken on line lVlV of Fig. 1showing the closed inner end of the casing for the fan and the lugcarried thereby for attaching the inner end .of the fan structure casingto the motor,

Figure 5 is a side elevational view of the 58 shaft for supporting therotatable fan,

Figure 6 is a front end elevational view of the fan structure,

Figure 7 is a rear end elevational view of the fan structure,

Serial No. 641,193.

Figure 8 is a perspective view of the fan structure showing therelatively short and long fan blades,

Figures 9 and-'10 show side elevational views of the large and small fanblades, and

Figure 11 is a side elevational view of the anchoring bolt forsupporting the outer end of the fan structure upon the motor.

Referring more in detail to the accompanying drawing, the fan structureembodies a casing having a cylindrical wall 1 and an inset bottom wall 2surrounded by a depressed channel 3 inwardly of the side wall l asclearly shown in Figs. 1 and t, the forward open end of the casinghaving an inwardly directed angular shoulder 4 with spider bars 5extending across the 0 on end of the casing as" shown in Fig. 1. i hechannel portion 3 of the casing is broken and separated by anintervening portion 2 0f the bottom wall 2 while one end of the channelportion 3 has a conduitfi formed integral with the casing andextending'to an air chamber in the motor 7 illustrated .by dotted linesin Fig. 1.

The support for the closed end of the casing includes diametricallyopposite apertured lugs 8 carried by the side wall 1 adjacent thechannel 3 through which fastening members, such as screw bolts, pass tobe se-' cured in the motor 7.

A frame structure encloses the casing and traverses the open forward endthereof, a forwardly positioned bracket comprising abutting plates 9 and10 with the plate 10 offset as at 10 having mounting rods 11 threaded atopposite ends as at 12 passing through registering openings 13 inopposite ends of the bracket plates 9 and 10 for the reception of locknuts, while the opposite ends of the bars 12 are secured in the motor 7.

The shaft 14 is journaled at one of its ends in the opening 15 in thebottom wall 2 of the casing with the other end thereof rotatablyextending through openings 16 in the bracket plates 9 and 10, a pulleyl?being keyed to the shaft ,14 intermediate the bracket plates 9 and 10between the ends thereof as shown in Figs. 1 and 3.

The fan includes a. conical drum 18 that is keyed to the shaft 1 1-within the casing, the conical drum 18 carrying relatively small andlarge fan blades 19 and 20 respectively with the forward edges-of thelarger blades 20 having angular cutaway corner edges 20 to accommodatethe angular shoulder 4: upon the forward end of the casing wall 1.

From the above detail description of the device, it is believed that theconstruction and operation thereof will at once be apparent, it beingnoted that the rear end of the casing is supported by the lateral lugs 8upon'the motor 7 while the forward end thereof is supported by thespider bars 5 through which the rotatable shaft 14: extends, a beltpassing over the pulley 17 to rotate the shaft 14: and fan wheel asshown in Figs. 1 and 8 carried thereby. Air is drawn in through the openfront end of the casing and driven toward the rear closed end thereof,filling the chamber 3 and traveling therein to the outlet conduit 6 fordelivery to the air chamber in the motor 7 for circulating air throughthe latter'to cool the motor, the angular shoulders upon the casingcooperating with the fan structure to hold the latter in proper positionwithin the casing and upon the shaft 14:. The outer end of the shaft 14with the bracket plates 9 and 10 are supported by the bars 11 to presenta rigid structure supporting the fan mechanism.

While there is herein shown and described the preferred embodiment ofthe present invention, it is nevertheless to be understood that minorchanges may be made therein without departing from the spirit and scopeof the invention as claimed.

-What isclaimed as new is 1. In a fan structure for air cooled motors acasing secured to the motor, a bracket traversing the forward end of thecasing, supporting bars for the bracket secured to the motor, a shaftjournaled in the bracket and casing, a fan secured to the shaft withinthe casing, a discharge conduit extending from the casing, said bracketcomprising a pair of bars with one of the bars odiset intermediate theends and a belt pulley secured to the shaft intermediate the bracketbars.

2. In a fan structure for air cooled motors, a casing secured to themotor, a bracket traversing the forward end of the casing,supporting-bars for the bracket secured to the motor, a shaft journaledin the bracket and casing, a fan secured to the shaft within the casing,a discharge conduit extending from the casing, said bracket comprising apair of bars with one of the bars offset intermediate the ends, a beltpulley secured to the shaft intermediate the bracket bars, said casingbeing open at its forward end and a circular channel formed in theclosed .inner end of the casing separated by a portion of the inner endwall with the conduit connected to one end of the channel. v

3. Ina fan structure for air cooled motors, a casing secured to themotor, a bracket traversing the forward end of the casing, supportingbars for the bracket secured to the motor, a shaft journaled in thebracket and easing, a fan secured to the shaft within the casing, adischarge conduit extending from the casing, said bracket comprising apair of bars with one of the bars offset intermediate the ends, a beltpulley secured to the shaft intermediate the bracket bars, said casingbeing open at its forward end, a circular channel formed in the closedinner end of the casing separated by a portion of the inner end wallwith the conduit connected to one end of the channel, said fan includinga. conical drum secured to the shaft, fan blades carried by the drum,the forward outer corner edges of alternate blades havill ing anglenotches therein and the outer peripheral edge of the casing having an inwardly directed angular shoulder extending into the blade notches.

In testimony whereof I affix my signature.

JOHN lBlLAN.

